Surgical adapter assemblies for use between surgical handle assembly and surgical end effectors

ABSTRACT

Adapter assemblies selectively interconnect a surgical end effector that is configured to perform at least a pair of functions and a surgical device that is configured to actuate the end effector. The adapter assembly includes an adapter knob housing configured and adapted for connection with the surgical device and to be in operative communication with each of the at least one rotatable drive shaft of the surgical device. The adapter knob housing defines a lumen extending longitudinally therethrough and a ring gear formed in an inner surface of the lumen of the adapter knob housing. The ring gear defines an internal array of gear teeth which are engaged with a spur gear of a rotatable drive shaft. The adapter knob housing may be a unitary member and may be formed of plastic.

CROSS REFERENCE TO RELATED APPLICATION

The present application is a continuation application of U.S. patent application Ser. No. 13/904,069, filed on May 29, 2013, which claims the benefit of and priority to U.S. Provisional Application Ser. No. 61/669,228, filed on Jul. 9, 2012, the entire contents of all of which are incorporated by reference herein.

BACKGROUND

1. Technical Field

The present disclosure relates to surgical devices. More specifically, the present disclosure relates to surgical adapters and/or adapter assemblies for use between and for interconnecting a powered, rotating and/or articulating surgical device or handle assembly and an end effector for clamping, cutting and/or stapling tissue.

2. Background of Related Art

One type of surgical device is a linear clamping, cutting and stapling device. Such a device may be employed in a surgical procedure to resect a cancerous or anomalous tissue from a gastro-intestinal tract. Conventional linear clamping, cutting and stapling instruments include a pistol grip-styled structure having an elongated shaft and distal portion. The distal portion includes a pair of scissors-styled gripping elements, which clamp the open ends of the colon closed. In this device, one of the two scissors-styled gripping elements, such as the anvil portion, moves or pivots relative to the overall structure, whereas the other gripping element remains fixed relative to the overall structure. The actuation of this scissoring device (the pivoting of the anvil portion) is controlled by a grip trigger maintained in the handle.

In addition to the scissoring device, the distal portion also includes a stapling mechanism. The fixed gripping element of the scissoring mechanism includes a staple cartridge receiving region and a mechanism for driving the staples up through the clamped end of the tissue against the anvil portion, thereby sealing the previously opened end. The scissoring elements may be integrally formed with the shaft or may be detachable such that various scissoring and stapling elements may be interchangeable.

A number of surgical device manufacturers have developed product lines with proprietary powered drive systems for operating and/or manipulating the surgical device. In many instances the surgical devices include a powered handle assembly, which is reusable, and a disposable end effector or the like that is selectively connected to the powered handle assembly prior to use and then disconnected from the end effector following use in order to be disposed of or in some instances sterilized for re-use.

Many of the existing end effectors for use with many of the existing powered surgical devices and/or handle assemblies are driven by a linear force. For examples, end effectors for performing endo-gastrointestinal anastomosis procedures, end-to-end anastomosis procedures and transverse anastomosis procedures, each typically require a linear driving force in order to be operated. As such, these end effectors are not compatible with surgical devices and/or handle assemblies that use a rotary motion to deliver power or the like.

In order to make the linear driven end effectors compatible with powered surgical devices and/or handle assemblies that use a rotary motion to deliver power, a need exists for adapters and/or adapter assemblies to interface between and interconnect the linear driven end effectors with the powered rotary driven surgical devices and/or handle assemblies.

Many of these powered rotary driven surgical devices and/or handle assemblies are complex devices, including many parts and requiring extensive labor to assemble. Accordingly, a need exists to develop powered rotary driven surgical devices and/or handle assemblies that incorporate fewer parts, are less labor intensive to assemble and ultimately more economical to manufacture.

SUMMARY

The present disclosure relates to surgical adapters and/or adapter assemblies for use between and for interconnecting a powered, rotating and/or articulating surgical device or handle assembly and an end effector for clamping, cutting and/or stapling tissue.

According to an aspect of the present disclosure, an adapter assembly is provided for selectively interconnecting a surgical end effector that is configured to perform a function and a surgical device that is configured to actuate the end effector, the end effector including at least one axially translatable drive member, and the surgical device including at least one rotatable drive shaft. The adapter assembly includes an adapter knob housing configured and adapted for connection with the surgical device and to be in operative communication with each of the at least one rotatable drive shaft of the surgical device. The adapter knob housing defines a lumen extending longitudinally therethrough. The adapter assembly includes an outer tube having a proximal end supported by the adapter knob housing and a distal end configured and adapted for connection with the end effector, wherein the distal end of the outer tube is in operative communication with each of the at least one axially translatable drive member of the end effector. The adapter assembly includes a drive transmitting assembly having a proximal rotatable drive shaft rotatably supported in the adapter knob housing and having a spur gear supported on a distal end thereof and a proximal end connectable to a rotatable drive shaft of the surgical device; and a ring gear formed in an inner surface of the lumen of the adapter knob housing, the ring gear defining an internal array of gear teeth which are engaged with the spur gear of the proximal rotatable drive shaft. In use, rotation of the rotatable drive shaft of the surgical device results in rotation of the proximal drive shaft, and wherein rotation of the proximal drive shaft results in rotation of adapter knob housing via the ring gear, and rotation of the distal coupling assembly to rotate the end effector.

According to another aspect of the present disclosure, an electromechanical surgical system is provided and includes a hand-held surgical device, an end effector, and an adapter assembly for selectively interconnecting the end effector and the surgical device.

The hand-held surgical device includes a device housing defining a connecting portion for selectively connecting with an adapter assembly.

The end effector includes at least one axially translatable drive member.

The adapter assembly includes an adapter knob housing configured and adapted for connection with the surgical device and to be in operative communication with each of the at least one rotatable drive shaft of the surgical device. The adapter knob housing defines a lumen extending longitudinally therethrough. The adapter assembly includes an outer tube having a proximal end supported by the adapter knob housing and a distal end configured and adapted for connection with the end effector, wherein the distal end of the outer tube is in operative communication with each of the at least one axially translatable drive member of the end effector. The adapter assembly includes a drive transmitting assembly having a proximal rotatable drive shaft rotatably supported in the adapter knob housing and having a spur gear supported on a distal end thereof and a proximal end connectable to a rotatable drive shaft of the surgical device; and a ring gear formed in an inner surface of the lumen of the adapter knob housing, the ring gear defining an internal array of gear teeth which are engaged with the spur gear of the proximal rotatable drive shaft. In use, rotation of the rotatable drive shaft of the surgical device results in rotation of the proximal drive shaft, and wherein rotation of the proximal drive shaft results in rotation of adapter knob housing via the ring gear, and rotation of the distal coupling assembly to rotate the end effector.

The adapter knob housing may be a unitary member.

The adapter knob housing may be formed of plastic.

The adapter knob housing may include a distal housing half, and a proximal housing half secured to the distal housing half.

BRIEF DESCRIPTION OF THE DRAWINGS

Embodiments of the present disclosure are described herein with reference to the accompanying drawings, wherein:

FIG. 1 is a perspective view, with parts separated, of a surgical device and adapter assembly, in accordance with an embodiment of the present disclosure, illustrating a connection thereof with an end effector;

FIG. 2 is a perspective view of the surgical device of FIG. 1;

FIG. 3 is a perspective view of the connecting ends of each of the surgical device and the adapter assembly, illustrating a connection therebetween;

FIG. 4 is a perspective view of the adapter of FIG. 1;

FIG. 5 is a perspective view, with parts separated, of the adapter assembly of FIGS. 1-4;

FIG. 6 is a cross-sectional view of the adapter of FIGS. 1-5, as taken through 6-6 of FIG. 4;

FIG. 7 is a rear, perspective view of an adapter assembly including a knob housing according to another embodiment of the present disclosure;

FIG. 8 is a rear, perspective view of the knob housing of the adapter assembly of FIG. 7;

FIGS. 9 and 10 are perspective, cross-sectional views of the knob housing of FIGS. 7 and 8;

FIG. 11 is a perspective view, with parts separated, of an exemplary end effector for use with the surgical device and the adapter assembly of the present disclosure; and

FIG. 12 is a schematic illustration of the outputs to the LED's; selection of motor (to select clamping/cutting, rotation or articulation); and selection of the drive motors to perform a function selected.

DETAILED DESCRIPTION OF EMBODIMENTS

Embodiments of the presently disclosed surgical devices, and adapter assemblies for surgical devices and/or handle assemblies are described in detail with reference to the drawings, in which like reference numerals designate identical or corresponding elements in each of the several views. As used herein the term “distal” refers to that portion of the adapter assembly or surgical device, or component thereof, farther from the user, while the term “proximal” refers to that portion of the adapter assembly or surgical device, or component thereof, closer to the user.

A surgical device, in accordance with an embodiment of the present disclosure, is generally designated as 100, and is in the form of a powered hand held electromechanical instrument configured for selective attachment thereto of a plurality of different end effectors that are each configured for actuation and manipulation by the powered hand held electromechanical surgical instrument.

As illustrated in FIG. 1, surgical device 100 is configured for selective connection with an adapter assembly 200, and, in turn, adapter assembly 200 is configured for selective connection with an end effector or single use loading unit 300.

As illustrated in FIGS. 1 and 2, surgical device 100 includes a handle housing 102 having a lower housing portion 104, an intermediate housing portion 106 extending from and/or supported on lower housing portion 104, and an upper housing portion 108 extending from and/or supported on intermediate housing portion 106. Intermediate housing portion 106 and upper housing portion 108 are separated into a distal half-section that is integrally formed with and extending from the lower portion 104, and a proximal half-section connectable to the distal half-section by a plurality of fasteners. When joined, the distal and proximal half-sections define a handle housing 102 having a cavity therein in which a circuit board (not shown) and a drive mechanism (not shown) is situated.

With reference to FIGS. 1-3, the distal half-section of upper housing portion 108 defines a nose or connecting portion 108 a. A nose cone 114 is supported on nose portion 108 a of upper housing portion 108. Nose cone 114 is fabricated from a transparent material. An illumination member (not shown) is disposed within nose cone 114 such that the illumination member is visible therethrough. The illumination member may be in the form of a light emitting diode printed circuit board (LED PCB). The illumination member may be configured to illuminate multiple colors with a specific color pattern being associated with a unique discrete event.

Upper housing portion 108 of handle housing 102 provides a housing in which the drive mechanism is situated. The drive mechanism is configured to drive shafts and/or gear components in order to perform the various operations of surgical device 100. In particular, the drive mechanism is configured to drive shafts and/or gear components in order to selectively move tool assembly 304 of end effector 300 (see FIGS. 1 and 11) relative to proximal body portion 302 of end effector 300, to rotate end effector 300 about a longitudinal axis “X” (see FIG. 3) relative to handle housing 102, to move anvil assembly 306 relative to cartridge assembly 308 of end effector 300, and/or to fire a stapling and cutting cartridge within cartridge assembly 308 of end effector 300.

As illustrated in FIGS. 1-3, and as mentioned above, the distal half-section of upper housing portion 108 defines a connecting portion 108 a configured to accept a corresponding drive coupling assembly 210 of adapter assembly 200.

As illustrated in FIGS. 2 and 3, connecting portion 108 a of surgical device 100 has a cylindrical recess 108 b that receives a drive coupling assembly 210 of adapter assembly 200 when adapter assembly 200 is mated to surgical device 100. Connecting portion 108 a houses three rotatable drive connectors 118, 120, 122.

When adapter assembly 200 is mated to surgical device 100, each of rotatable drive connectors 118, 120, 122 of surgical device 100 couples with a corresponding rotatable connector sleeve 218, 220, 222 of adapter assembly 200. (see FIG. 3). In this regard, the interface between corresponding first drive connector 118 and first connector sleeve 218, the interface between corresponding second drive connector 120 and second connector sleeve 220, and the interface between corresponding third drive connector 122 and third connector sleeve 222 are keyed such that rotation of each of drive connectors 118, 120, 122 of surgical device 100 causes a corresponding rotation of the corresponding connector sleeve 218, 220, 222 of adapter assembly 200.

The mating of drive connectors 118, 120, 122 of surgical device 100 with connector sleeves 218, 220, 222 of adapter assembly 200 allows rotational forces to be independently transmitted via each of the three respective connector interfaces. The drive connectors 118, 120, 122 of surgical device 100 are configured to be independently rotated by the drive mechanism. In this regard, a function selection module of the drive mechanism selects which drive connector or connectors 118, 120, 122 of surgical device 100 is to be driven by an input drive component of the drive mechanism.

Since each of drive connectors 118, 120, 122 of surgical device 100 has a keyed and/or substantially non-rotatable interface with respective connector sleeves 218, 220, 222 of adapter assembly 200, when adapter assembly 200 is coupled to surgical device 100, rotational force(s) are selectively transferred from the drive mechanism of surgical device 100 to adapter assembly 200.

The selective rotation of drive connector(s) 118, 120 and/or 122 of surgical device 100 allows surgical device 100 to selectively actuate different functions of end effector 300. As will be discussed in greater detail below, selective and independent rotation of first drive connector 118 of surgical device 100 corresponds to the selective and independent opening and closing of tool assembly 304 of end effector 300, and driving of a stapling/cutting component of tool assembly 304 of end effector 300. Also, the selective and independent rotation of second drive connector 120 of surgical device 100 corresponds to the selective and independent articulation of tool assembly 304 of end effector 300 transverse to longitudinal axis “X” (see FIG. 4). Additionally, the selective and independent rotation of third drive connector 122 of surgical device 100 corresponds to the selective and independent rotation of end effector 300 about longitudinal axis “X” (see FIG. 4) relative to handle housing 102 of surgical device 100.

As illustrated in FIGS. 1 and 2, handle housing 102 supports a pair of finger-actuated control buttons 124, 126 and rocker devices 128, 130.

Actuation of first control button 124 causes tool assembly 304 of end effector 300 to close and/or a stapling/cutting cartridge within tool assembly 304 of end effector 300 to fire.

Actuation of rocker device 128 in a first direction causes tool assembly 304 to articulate relative to body portion 302 in a first direction, while actuation of rocker device 128 in an opposite, e.g., second, direction causes tool assembly 304 to articulate relative to body portion 302 in an opposite, e.g., second, direction.

Actuation of control button 126 causes tool assembly 304 of end effector 300 to open.

Actuation of rocker device 130 causes end effector 300 to rotate relative to handle housing 102 of surgical device 100. Specifically, movement of rocker device 130 in a first direction causes end effector 300 to rotate relative to handle housing 102 in a first direction, while movement of rocker device 130 in an opposite, e.g., second, direction causes end effector 300 to rotate relative to handle housing 102 in an opposite, e.g., second, direction.

As illustrated in FIGS. 1-3, surgical device 100 is configured for selective connection with adapter assembly 200, and, in turn, adapter assembly 200 is configured for selective connection with end effector 300.

Adapter assembly 200 is configured to convert a rotation of either of drive connectors 120 and 122 of surgical device 100 into axial translation useful for operating a drive assembly 360 and an articulation link 366 of end effector 300, as illustrated in FIG. 11.

Adapter assembly 200 may include a first drive transmitting/converting assembly for interconnecting third rotatable drive connector 122 of surgical device 100 and a first axially translatable drive member of end effector 300, wherein the first drive transmitting/converting assembly converts and transmits a rotation of third rotatable drive connector 122 of surgical device 100 to an axial translation of the first axially translatable drive assembly 360 (see FIG. 7) of end effector 300 for firing.

Adapter assembly 200 may include a second drive transmitting/converting assembly for interconnecting second rotatable drive connector 120 of surgical device 100 and a second axially translatable drive member of end effector 300, wherein the second drive transmitting/converting assembly converts and transmits a rotation of second rotatable drive connector 120 of surgical device 100 to an axial translation of articulation link 366 (see FIG. 11) of end effector 300 for articulation.

Turning now to FIGS. 1-6, adapter assembly 200 includes a knob housing 202 and an outer tube 206 extending from a distal end of knob housing 202. Knob housing 202 and outer tube 206 are configured and dimensioned to house the components of adapter assembly 200. Outer tube 206 is dimensioned for endoscopic insertion, in particular, that outer tube is passable through a typical trocar port, cannula or the like. Knob housing 202 is dimensioned to not enter the trocar port, cannula of the like.

Knob housing 202 is configured and adapted to connect to connecting portion 108 a of upper housing portion 108 of the distal half-section of surgical device 100.

As seen in FIGS. 1-6, adapter assembly 200 includes a surgical device drive coupling assembly 210 at a proximal end thereof and to an end effector coupling assembly 230 at a distal end thereof. Drive coupling assembly 210 includes a distal drive coupling housing 210 a and a proximal drive coupling housing 210 b rotatably supported, at least partially, in knob housing 202. Drive coupling assembly 210 rotatably supports a first rotatable proximal drive shaft 212 (see FIG. 6), a second rotatable proximal drive shaft 214 (see FIG. 5), and a third rotatable proximal drive shaft 216 (see FIG. 6) therein.

Proximal drive coupling housing 210 b is configured to rotatably support first, second and third connector sleeves 218, 220 and 222 (see FIGS. 3 and 6), respectively. Each of connector sleeves 218, 220, 222 is configured to mate with respective first, second and third drive connectors 118, 120, 122 of surgical device 100, as described above. Each of connector sleeves 218, 220, 222 is further configured to mate with a proximal end of respective first, second and third proximal drive shafts 212, 214, 216.

Adapter assembly 200 includes a first, a second and a third drive transmitting/converting assembly, as mentioned above, disposed within handle housing 202 and outer tube 206. Each drive transmitting/converting assembly is configured and adapted to transmit or convert a rotation of a first, second and third drive connector 118, 120, 122 of surgical device 100 into axial translation of a drive tube and a drive bar of adapter assembly 200, to effectuate closing, opening, articulating and firing of end effector 300; or a rotation of adapter assembly 200.

As seen in FIGS. 4-6 and as mentioned above, adapter assembly 200 includes a third drive transmitting/converting assembly. Third drive transmitting/converting assembly is integrally formed in knob housing 202. In FIG. 5, knob housing 202 is shown as having a first half section and a second half section, for illustrative purposes only. In accordance with the scope of the present disclosure, knob housing 202 is formed as a single unitary (one-piece) molded component, devoid of any split half sections. By providing a unitary molded component, knob housing 202 may be more robust as compared to a knob housing having a pair of half sections. It is contemplated that knob housing 202 may be fabricated from plastic or the like using any method known to one having skill in the art.

Knob housing 202 defines a longitudinally extending lumen 202 a extending therethrough. Knob housing includes a pair of diametrically opposed bosses 202 b, 202 c extending radially into lumen 202 a. Knob housing 202 further includes an internal ring gear 202 d formed in the surface of lumen 202 a.

As seen in FIG. 6, the third drive transmitting/converting assembly includes a rotatable proximal drive shaft 216 rotatably supported within housing 202. A proximal end portion of rotatable proximal drive shaft 216 is keyed to third connector 222 of adapter assembly 200. Rotatable proximal drive shaft 216 includes a spur gear 216 a keyed to a distal end thereof. A gear set 274 inter-engages spur gear 216 a of rotatable proximal drive shaft 216 to the gear teeth of ring gear 202 d of knob housing 202. Gear set 274 includes a first gear 274 a engaged with spur gear 216 a of third rotatable proximal drive shaft 216, and a second gear 274 b engaged with the gear teeth of ring gear 202 d.

In operation, as rotatable proximal drive shaft 216 is rotated, due to a rotation of third connector sleeve 222, as a result of the rotation of the third respective drive connector 122 of surgical device 100, spur gear 216 a of rotatable proximal drive shaft 216 engages first gear 272 a of gear set 274 causing gear set 274 to rotate. As gear set 274 rotates, second gear 274 b of gear set 274 is rotated and thus causes ring gear 202 d to also rotate thereby causing knob housing 202 to rotate. As knob housing 202 is rotated, the pair of diametrically opposed bosses 202 b, 202 c of knob housing 202 are rotated therewith, thereby transmitting rotation to inner housing tube 206 a. As inner housing tube 206 a is rotated, distal coupling assembly 230 connected thereto, is caused to be rotated about longitudinal axis “X” of adapter assembly 200. As distal coupling 230 is rotated, end effector 300, that is connected to distal coupling assembly 230, is also caused to be rotated about longitudinal axis “X” of adapter assembly 200.

By forming knob housing 202 as a single unitary component, as compared to an assembly including multiple components manufactured from multiple different materials, knob housing 202 of the present disclosure reduces a relative cost and a relative complexity of shaft assembly 200. In particular, manufacturing time of a single unitary knob housing 202 is reduced as compared to a multi-component knob housing. The overall weight of shaft assembly 200, including a single unitary knob housing 202, will be reduced as compared to a shaft assembly including a multi-component knob housing. The assembly of shaft assembly 200, including a single unitary knob housing 202, will be simplified as compared to the assembly of a shaft assembly including a multi-component knob housing.

Additionally, providing a shaft assembly 200, including a single unitary knob housing 202, will be reduce or eliminate clearances inherently present in shaft assemblies including a multi-component knob housing. By reducing and/or eliminating clearances, a shaft assembly 200, including a single unitary knob housing 202, reduces backlash or play which would otherwise be present in the rotation system (i.e., the third drive transmitting/converting assembly) of surgical device 100 and shaft assembly 200. This will translate into an increase of accuracy from the number input turns to rotation of shaft assembly 200.

Also, the single unitary knob housing 202 will minimize undesired movement and wobbling between the knob housing 202, surgical device drive coupling assembly 210, and outer tube 206.

Turning now to FIGS. 7-10, an adapter assembly 1200 including a knob housing 1202, according to another embodiment of the present disclosure, is shown and will be described. Knob housing 1202 defines a longitudinally extending lumen 1202 a extending therethrough. Knob housing 1202 includes a distal housing half 1203 a and a proximal housing half or cap 1203 b, joined to one another via screw fasteners (not shown) or the like. Proximal housing half 1203 b is configured to receive drive coupling assembly 210 therethrough.

Knob housing 1202 further includes an internal ring gear 1202 d formed in the surface of lumen 1202 a thereof. In particular, internal ring gear 1202 d is formed in distal housing half 1203 a of knob housing 1202.

As discussed above with regard to adapter assembly 200, adapter assembly 1200 includes a third drive transmitting/converting assembly including a gear set having a spur gear of rotatable proximal drive shaft that engages the gear teeth of ring gear 1202 d of knob housing 1202.

Distal housing half 1203 a of knob housing 1202 is formed as a single, unitary component (i.e., not split longitudinally). Knob housing 1202, including distal housing half 1203 a has all the advantages described above as related to knob housing 202.

In operation, when a button of surgical device 100 is activated by the user, the software checks predefined conditions. If conditions are met, the software controls the motors and delivers mechanical drive to the attached surgical stapler, which can then open, close, rotate, articulate or fire depending on the function of the pressed button. The software also provides feedback to the user by turning colored lights on or off in a defined manner to indicate the status of surgical device 100, adapter assembly 200 and/or end effector 300.

A high level electrical architectural view of the system is displayed in FIG. 12 and shows the connections to the various hardware and software interfaces. Inputs from presses of buttons 124, 126 and from motor encoders of the drive shaft are shown on the left side of FIG. 12. The microcontroller contains the device software that operates surgical device 100, adapter assembly 200 and/or end effector 300. The microcontroller receives inputs from and sends outputs to a MicroLAN, an Ultra ID chip, a Battery ID chip, and Adaptor ID chips.

The MicroLAN, the Ultra ID chip, the Battery ID chip, and the Adaptor ID chips control surgical device 100, adapter assembly 200 and/or end effector 300 as follows:

MicroLAN Serial 1-wire bus communication to read/write system component ID information. Ultra ID chip identifies surgical device 100 and records usage information. Battery ID chip identifies the Battery 156 and records usage information. Adaptor ID chip identifies the type of adapter assembly 200, records the presence of an end effector 300, and records usage information.

The right side of the schematic illustrated in FIG. 12 indicates outputs to the LED's; selection of motor (to select clamping/cutting, rotation or articulation); and selection of the drive motors to perform the function selected.

As illustrated in FIGS. 1 and 11, the end effector is designated as 300. End effector 300 is configured and dimensioned for endoscopic insertion through a cannula, trocar or the like. In particular, in the embodiment illustrated in FIGS. 1 and 11, end effector 300 may pass through a cannula or trocar when end effector 300 is in a closed condition.

End effector 300 includes a proximal body portion 302 and a tool assembly 304. Proximal body portion 302 is releasably attached to a distal coupling 230 of adapter assembly 200 and tool assembly 304 is pivotally attached to a distal end of proximal body portion 302. Tool assembly 304 includes an anvil assembly 306 and a cartridge assembly 308. Cartridge assembly 308 is pivotal in relation to anvil assembly 306 and is movable between an open or unclamped position and a closed or clamped position for insertion through a cannula of a trocar.

Proximal body portion 302 includes at least a drive assembly 360 and an articulation link 366.

Referring to FIG. 11, drive assembly 360 includes a flexible drive beam 364 having a distal end which is secured to a dynamic clamping member 365, and a proximal engagement section 368. Engagement section 368 includes a stepped portion defining a shoulder 370. A proximal end of engagement section 368 includes diametrically opposed inwardly extending fingers 372. Fingers 372 engage a hollow drive member 374 to fixedly secure drive member 374 to the proximal end of beam 364. Drive member 374 defines a proximal porthole 376 which receives connection member 247 of drive tube 246 of first drive converter assembly 240 of adapter assembly 200 when end effector 300 is attached to distal coupling 230 of adapter assembly 200.

When drive assembly 360 is advanced distally within tool assembly 304, an upper beam of clamping member 365 moves within a channel defined between anvil plate 312 and anvil cover 310 and a lower beam moves over the exterior surface of carrier 316 to close tool assembly 304 and fire staples therefrom.

Proximal body portion 302 of end effector 300 includes an articulation link 366 having a hooked proximal end 366 a which extends from a proximal end of end effector 300. Hooked proximal end 366 a of articulation link 366 engages coupling hook 258 c of drive bar 258 of adapter assembly 200 when end effector 300 is secured to distal housing 232 of adapter assembly 200. When drive bar 258 of adapter assembly 200 is advanced or retracted as described above, articulation link 366 of end effector 300 is advanced or retracted within end effector 300 to pivot tool assembly 304 in relation to a distal end of proximal body portion 302.

As illustrated in FIG. 11, cartridge assembly 308 of tool assembly 304 includes a staple cartridge 305 supportable in carrier 316. Staple cartridge 305 defines a central longitudinal slot 305 a, and three linear rows of staple retention slots 305 b positioned on each side of longitudinal slot 305 a. Each of staple retention slots 305 b receives a single staple 307 and a portion of a staple pusher 309. During operation of surgical device 100, drive assembly 360 abuts an actuation sled and pushes actuation sled through cartridge 305. As the actuation sled moves through cartridge 305, cam wedges of the actuation sled sequentially engage staple pushers 309 to move staple pushers 309 vertically within staple retention slots 305 b and sequentially eject a single staple 307 therefrom for formation against anvil plate 312.

Reference may be made to U.S. Pat. No. 7,819,896, filed on Aug. 31, 2009, entitled “TOOL ASSEMBLY FOR A SURGICAL STAPLING DEVICE,” the entire content of which is incorporated herein by reference, for a detailed discussion of the construction and operation of end effector 300.

Reference may also be made to U.S. Patent Application Publication No. 2012/0253329, filed on May 31, 2012, entitled “HAND HELD SURGICAL HANDLE ASSEMBLY, SURGICAL ADAPTERS FOR USE BETWEEN SURGICAL HANDLE ASSEMBLY AND SURGICAL END EFFECTORS, AND METHODS OF USE”, the entire content of which is incorporated herein by reference, for a detailed discussion of the construction and operation of any of the remaining components of surgical device 100, adapter assembly 200, and end effector 300.

It will be understood that various modifications may be made to the embodiments of the presently disclosed adapter assemblies. Therefore, the above description should not be construed as limiting, but merely as exemplifications of embodiments. Those skilled in the art will envision other modifications within the scope and spirit of the present disclosure. 

What is claimed is:
 1. An adapter assembly for selectively interconnecting a surgical end effector and a surgical device, the adapter assembly comprising: an adapter knob housing configured to couple to the surgical device, the adapter knob housing having an inner surface defining a lumen extending longitudinally through the adapter knob housing, the adapter knob housing including a ring gear formed in the inner surface of the adapter knob housing and a pair of bosses extending radially into the lumen; an outer tube having a proximal end supported by the adapter knob housing and engaged by the pair of bosses and a distal end configured to couple to the end effector; and a proximal drive shaft defining a longitudinal axis and rotatably supported in the adapter knob housing, the proximal drive shaft having a gear engaged with the ring gear such that rotation of the proximal drive shaft about the longitudinal axis rotates the adapter knob housing and the end effector.
 2. The adapter assembly according to claim 1, wherein the ring gear has an internal array of gear teeth.
 3. The adapter assembly according to claim 2, wherein the internal array of gear teeth project into the lumen.
 4. The adapter assembly according to claim 1, wherein the adapter knob housing is monolithic.
 5. The adapter assembly according to claim 4, wherein the adapter knob housing is formed from a thermoplastic polymer.
 6. The adapter assembly according to claim 1, wherein the adapter knob housing includes: a distal housing portion; and a proximal housing portion secured to the distal housing portion.
 7. An electromechanical surgical system, comprising: a hand-held surgical device having a rotatable drive shaft; an end effector; and an adapter assembly for selectively interconnecting the end effector and the surgical device, the adapter assembly including: an adapter knob housing configured to couple to the surgical device, the adapter knob housing having an inner surface defining a lumen extending longitudinally through the adapter knob housing, the adapter knob housing including a ring gear formed in the inner surface of the adapter knob housing and a pair of bosses extending radially into the lumen; an outer tube having a proximal end supported by the adapter knob housing and engaged by the pair of bosses a distal end configured to couple to the end effector; and a proximal drive shaft defining a longitudinal axis and rotatably supported in the adapter knob housing, the proximal drive shaft being connectable to the rotatable drive shaft of the surgical device, wherein the proximal drive shaft includes a gear engaged with the ring gear such that rotation of the rotatable drive shaft of the surgical device rotates the proximal drive shaft about the longitudinal axis, and wherein rotation of the proximal drive shaft rotates the adapter knob housing to rotate the end effector.
 8. The electromechanical surgical system according to claim 7, wherein the ring gear has an internal array of gear teeth.
 9. The electromechanical surgical system according to claim 8, wherein the internal array of gear teeth project into the lumen.
 10. The electromechanical surgical system according to claim 7, wherein the adapter knob housing is monolithic.
 11. The electromechanical surgical system according to claim 10, wherein the adapter knob housing is formed from a thermoplastic polymer.
 12. The electromechanical surgical system according to claim 7, wherein the adapter knob housing includes: a distal housing portion; and a proximal housing portion secured to the distal housing portion. 